why im getting just ~300 mhs with r9 290... same card getting ~330-350 on zec?
Omg srsly? Different algo..obviously you should read the first page before asking such question.
i suppose he meant why he is getting such a ridiculous small amount of hash compared to other cards (a 7970/280X does 230-400 from what i have read), the equihash reference should likely tell us that this card usually does not underperform that much
well i could also be wrong

exactly... from what i have read i should getting 500-600 mhs with 290... i mentioned zec just to show that cards are fine... also on eth they get over 30mhs...i'm using new 0.2 miner and 15.12 driver under win 7 64 bit